Question

State reason to explain why covalent compound:
1. are bad conductor of electricity
2. have low melting and boiling point

Answer 1

1. because covalent bonds are formed by sharing of electrons..they don't have a free electron that is required for electricity transfer(electricity is the flow of free electrons!) thus they re bad conductors.. but ionic compounds are good conductor because of the same reason...
2. Simple molecules substances of molecules in which the atoms are joined by strong covalent bonds. However, the molecules are held together by weak forces so these substances have low melting andboiling points. They do not conduct electricity.

 

Answer 2

answer 1:as they contain molecules and not free ions,which are responsible for the conductance of electricity(non-polar covalent compound).
ans2:due to weak Vander waals force of attraction between molecules .less amount of energy is required to break the force of attraction.
hope it helps you